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Simulation of the extreme waves generated by typhoon Bolaven (1215) in the East China Sea and Yellow Sea

Acta Oceanologica Sinica 2015年第12期34卷 19-28页

作者： JUN Ki Cheon JEONG Weon Mu choi jin Yong PARK Kwang Soon JUNG Kyung Tae KIM Mee Kyung CHAE Jang Won QIAO Fangli Coastal Disaster Research Center Korea Institute of Ocean Science and Technology Coastal & Environmental Engineering Division Korea Institute of Ocean Science and Technology Marine Radionuclide Research Center Korea Institute of Ocean Science and Technology First Institute of Oceanography State Oceanic Administration

Record-breaking high waves occurred during the passage of the typhoon Bolaven（1215）（TYB） in the East China Sea（ECS） and Yellow Sea（YS） although its intensity did not reach the level of a super *** and directional wave measurements were made using a range of in-situ instruments mounted on an ocean tower and *** order to understand how such high waves with long duration occurred,analyses have been made through measurement and numerical *** winds were generated using the TC96 typhoon wind model with the best track data calibrated with the *** then the wind fields were blended with the reanalyzed synoptic-scale wind fields for a wave *** fields were simulated using WAM4.5 with adjustment of C_d for gust of winds and bottom friction for the study *** the accuracy of simulations is considerably enhanced,and the computed results are also in better agreement with measured data than *** is found that the extremely high waves evolved as a result of the superposition of distant large swells and high wind seas generated by strong winds from the front/right quadrant of the typhoon *** the typhoon moved at a speed a little slower than the dominant wave group velocity in a consistent direction for two days,the wave growth was significantly enhanced by strong wind input in an extended fetch and non-linear interaction.

关键词： extreme waves typhoon measurements numerical simulation East China Sea

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Long-term survival after gastrectomy and metastasectomy for gastric cancer with synchronous bone metastasis

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World Journal of Gastroenterology 2018年第1期24卷 150-156页

作者： Young jin choi Dae Hoon Kim Hye Suk Han Joung-Ho Han Seung-Myoung Son Dong Soo Kim Hyo Yung Yun Department of Surgery Chungbuk National University Hospital Chungbuk National University College of Medicine Department of Internal Medicine Chungbuk National University Hospital Chungbuk National University College of Medicine Department of Pathology Chungbuk National University Hospital Chungbuk National University College of Medicine Department of Orthopedics Chungbuk National University Hospital Chungbuk National University College of Medicine

Bone metastasis is a rare event in patients with gastric cancer, but pathologic fracture, paralysis, pain and hematological disorders associated with the bone metastasis may influence the quality of life. We report herein the case of a 53-year-old man who presented with primary remnant gastric cancer with bone metastasis. The patient requested further investigations after detection of a metastatic lesion in the 2 nd lumbar vertebra during evaluation for back pain that had persisted for 3 mo. No other metastatic lesions were detected. He underwent total gastrectomy and palliative metastasectomy to aid in reduction of symptoms, and he received combination chemotherapy with tegafur(S-1) and cisplatin. The patient survived for about 60 mo after surgery. Currently, there is no treatment guideline for gastric cancer with bone metastasis, and we believe that gastrectomy plus metastasectomy may be an effective therapeutic option for improving qualityof life and survival in patients with resectable primary gastric cancer and bone metastasis.

关键词： Stomach neoplasms Gastrectomy Bone neoplasms Neoplasm metastasis Metastasectomy

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Core-shell Structured Carbonaceous material/Polymeric Particle Composites and Their Electrorheology

Core-shell Structured Carbonaceous material/Polymeric Partic...

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第六届全国电磁流变液及其应用学术会议

作者： Hyoung jin choi Department of Polymer Science and Engineering Inha University

An electrorheological (ER) fluid as a kind of smart material that is composed of dielectric or conductive particle dispersed in insulated liquid, which can be changed from a liquid-like state to solid-like sate by applying an electric field. The core-shell structured particles based ER materials with insulated polymer particles as core and the conducting material as shell have been widely studied. Recently, novel material-carbon nanotubes (CNT) possess high conductivity, low mass density and good environmental stability, which are considered as essential candidates for ER materials. In this study, core-shell structured multi-walled carbon nanotube (MWNT)/ poly (methyl methacrylate) (PMMA) microspherical particles or MWNT/snowman-like (SL) particles were synthesized not only via a simple physical adsorption process but also by the chemical linkage under ultrasonication. To improve the adsorption of MWNT onto particle surface, carboxylic acid functional and amino-functional modification were respectively applied. The surface morphologies of the MWNT/PMMA microspheres (Fig. 1 and Fig. 2) and MWNT/SL particles and were observed by scanning electron microscopy, indicating that the functionalized MWNT successfully incorporated to particle surface.

关键词： multi-walled carbon nanotube PMMA electrorheological fluid ultrasonication.

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Promoter hypomethylation and reactivation of MAGE-A1 and MAGE-A3 genes in colorectal cancer cell lines and cancer tissues

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World Journal of Gastroenterology 2006年第35期12卷 5651-5657页

作者： Kyung-Hee Kim jin-Sung choi Il-jin Kim Ja-Lok Ku Jae-Gahb Park Laboratory of Cell Biology Korean Cell Line Bank Cancer Research Institute Seoul National University College of Medicine Seoul 110-744 Korea Laboratory of Cell Biology Korean Cell Line Bank Cancer Research Institute Seoul National University College of Medicine Seoul 110-744

AIM： To verify the expression and methylation status of the MAGE-A1 and MAGE-A3 genes in colorectal cancer tissues and cancer cell lines. METHODS： We evaluated promoter demethylation status of the MAGE-A1 and MAGE-A3 genes by RT-PCR analysis and methylation-specific PCR （MS-PCR）, as well as sequencing analysis, after sodium bisulfite modification in 32 colorectal cancer cell lines and 87 cancer tissues. RESULTS： Of the 32 cell lines, MAGE-A1 and MAGE-A3 expressions were observed in 59% and 66%, respectively. Subsequent to sodium bisulfite modification and MSPCR analysis, the promoter hypomethylation of MAGE-A1 and MAGE-A3 was confirmed in both at 81% each. Promoter hypomethylation of MAGE-A1 and MAGE-A3 in colorectal cancer tissues was observed in 43% and 77%, respectively. Hypomethylation of MAGE-A1 and MAGE-A3 genes in corresponding normal tissues were observed in 2% and 6%, respectively. CONCLUSION： The promoter hypomethylation of MAGE genes up-regulates its expression in colorectal carcinomas as well as in gastric cancers and might play a significant role in the development and progression of human colorectal carcinomas.

关键词： MAGE-A1 MAGE-A3 Promoter Hypomethylation Colorectal cancer

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T cell epitopes in SARS-CoV-2 proteins are substantially conserved in the Omicron variant

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Cellular & Molecular Immunology 2022年第3期19卷 447-448页

作者： Seong jin choi Dong-Uk Kim Ji Yun Noh Sangwoo Kim Su-Hyung Park Hye Won Jeong Eui-Cheol Shin Division of Infectious Disease Department of Internal MedicineSeoul National University HospitalSeoulRepublic of Korea Graduate School of Medical Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea Division of Infectious Diseases Department of Internal MedicineKorea University College of MedicineSeoulRepublic of Korea Department of Biomedical Systems Informatics Graduate School of Medical ScienceBrain Korea 21 ProjectYonsei University College of MedicineSeoulRepublic of Korea Department of Internal Medicine Chungbuk National University College of MedicineCheongjuRepublic of Korea The Center for Viral Immunology Korea Virus Research InstituteInstitute for Basic Science(IBS)DaejeonRepublic of Korea

In November 2021,the Omicron variant(B.1.1.529)emerged and was designated a variant of concern(VOC)by the World Health ***,Omicron was reported to extensively escape neutralizing antibodies elicited by COVID-19 vaccination or natural infection[1,2,3].However,whether Omicron evades the T cell immunity elicited by COVID-19 vaccination or natural infection remains to be *** address this issue,we analyzed the amino acid sequences of T cell epitopes identified from the original SARS-CoV-2 strain(Wuhan-Hu-1)in the Omicron variant(hCoV-19/South Africa/CERI-KRISP-K032284/2021).

关键词： neutral conserved elucidated

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Histopathology and TB-PCR kit analysis in differentiating the diagnosis of intestinal tuberculosis and Crohn’s disease

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World Journal of Gastroenterology 2010年第20期16卷 2496-2503页

作者： Joon Mee Kim Hyung Kil Kim Lucia Kim Suk jin choi In Suh Park Jee Young Han Young Chae Chu Kye Sook Kwon Eun Joo Kim Department of Pathology College of Medicine Inha University7-206 Shin-heung-Dong 3 GaJoong-GuIncheon 400-711South Korea Gastroenterology College of Medicine Inha University7-206 Shinheung-Dong 3 GaJoong-GuIncheon 400-711South Korea Department of Nano and Bio Research Daegu Gyeongbuk Institute of Science and TechnologyDeocksan-dong 110Daegu 700-742South Korea

AIM: To compare the histopathologic features of intestinal tuberculosis (ITB) and Crohn’s disease (CD) and to identify whether polymerase chain reaction for Mycobacterium tuberculosis (TB-PCR) would be helpful for differential diagnosis between ITB and ***: We selected 97 patients with established diagnoses (55 cases of ITB and 42 cases of CD) who underwent colonoscopic *** features of ITB and CD were reviewed,and eight pathologic parameters were *** cases of acid fast bacilli culture-positive specimens and 10 normal colonic tissue specimens were evaluated as the positive and negative control of the TB-PCR test,*** assays were done using two commercial kits: kit detected IS6110 and MPB64,and kit detected IS6110 only;a manual in-house PCR method was also performed on formalin-fi xed,paraffi n-embedded colonoscopic biopsy ***: Statistically significant differences were noted between ITB and CD with regard histopathologic criteria: size of granulomas (P = 0.000),giant cells (P = 0.015),caseation necrosis (P = 0.003),confluent granulomas (P = 0.001),discrete granulomas (P = 0.000),and granulomas with lymphoid cuffs (P = 0.037).However,29 cases (52.7%) of ITB showed less than fi ve kinds of pathologic parameters,resulting in confusion with *** sensitivities and specificities of the TB-PCR test by kit ,kit ,and the in-house PCR method were 88.9% and 100%,88.9% and 100%,and 66.7% and 100% in positive and negative controls,*** PCR test done on endoscopic biopsy specimens of ITB and CD were signifi cantly different with kit (P = 0.000) and kit (P = 0.000).The sensitivities and specifi cities of TB-PCR were 45.5% and 88.1%,36.4% and 100%,and 5.8% and 100%,for kit and kit and inhouse PCR method on endoscopic biopsy *** the 29 cases of histopathologically confusing CD,10 cases assayed using kit and 6 cases assayed using kit were TB-PCR positive.A combi

关键词： Intestine Tuberculosis Crohn’s disease Histopathology Polymerase chain reaction Kit IS6110 MPB64

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Dream of standalone CAE and its vision

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计算机辅助工程 2008年第4期17卷 I0007-I0010页

作者： choi jin-Hwan 韩国KyungHee大学机械系 FunctionBay总公司

CAE(Computer Aided Engineering) began in late 1960s in accordance with the rapid development of computer H/W and S/W *** now, engineering designs are depended mostly

关键词：计算机辅助工程计算机技术 CAE技术发展趋势

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In-situ observations of novel single-atom thick 2D tin membranes embedded in graphene

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Nano Research 2021年第3期14卷 747-753页

作者： Xiaoqin Yang Huy Q.Ta Wei Li Rafael G.Mendes Yu Liu Qitao Shi Sami Ullah Alicja Bachmatiuk jinping Luo Lijun Liu jin-Ho choi Mark H.Rummeli School of Energy and Power Engineering Xi’an Jiaotong UniversityNo.28Xianning West RoadXian710049China

There is ongoing research in freestanding single-atom thick elemental metal patches,including those suspended in a two-dimensional(2D)material,due to their utility in providing new structural and energetic insight into novel metallic 2D *** pores have shown promise as support systems for suspending such *** study explores the potential of Sn atoms to form freestanding stanene and/or Sn patches in graphene *** atoms were deposited on graphene,where they formed novel single-atom thick 2D planar clusters/patches(or membranes)ranging from 1 to 8 atoms within the graphene *** of three or more atoms adopted either a star-like or close-packed structural *** functional theory(DFT)calculations were conducted to look at the cluster configurations and energetics(without the graphene matrix)and were found to deviate from experimental observations for 2D patches larger than five *** was attributed to interfacial interactions between the graphene pore edges and Sn *** presented findings help advance the development of single-atom thick 2D elemental metal membranes.

关键词： in-situ transmission electron microscopy Sn atoms planar cluster graphene vacancy

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Changing trends and characteristics of peptic ulcer disease:A multicenter study from 2010 to 2019 in Korea

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World Journal of Gastroenterology 2023年第44期29卷 5882-5893页

作者： Yoon jin choi Tae Jun Kim Chang Seok Bang Yong Kang Lee Moon Won Lee Su Youn Nam Woon Geon Shin Seung In Seo Department of Internal Medicine National Cancer CenterGoyang-si 13620South Korea Department of Internal Medicine Samsung Medical CenterSeoul 06351South Korea Department of Internal Medicine Chuncheon Sacred Heart HospitalChuncheon 24253South Korea Department of Internal Medicine National Health Insurance Service Ilsan HospitalGoyang-si 10444South Korea Department of Internal Medicine Pusan National University School of MedicineBusan 50463South Korea Division of Gastroenterology and Hepatology Department of Internal MedicineKyungpook National University Chilgok HospitalDaegu 41404South Korea Department of Internal Medicine Kangdong Sacred Heart HospitalHallym University College of MedicineSeoul 05355South Korea Institute for Liver and Digestive Diseases Hallym UniversityChuncheon 24253South Korea Division of Gastroenterology Department of Internal MedicineKangdong Sacred Heart HospitalSeoul 05355South Korea

BACKGROUND The clinical trend and characteristics of peptic ulcer disease(PUD)have not fully been investigated in the past *** To evaluate the changing trends and characteristics of PUD according to age and METHODS We analyzed seven hospital databases converted into the Observational Medical Outcomes Partnership-Common Data Model between 2010 and *** classified patients with PUD who underwent rapid urease tests or Helicobacter pylori(***)serology into three groups:***-related,drug[nonsteroidal anti-inflammatory drugs(NSAIDs)or aspirin]-related,and idiopathic(***/NSAID/aspirin-negative)PUD and compared the yearly trends and characteristics among the three *** We included 26785 patients in 7 databases,and the proportion of old age(≥65 years)was 38.8%.The overall number of PUD exhibited no decrease,whereas PUD in old age revealed an increasing trend(P=0.01 for trend).Of the 19601 patients,41.8%had ***-related,36.1%had drug-related,and 22.1%had idiopathic *** PUD exhibited a decreasing trend after 2014(P=0.01),drug-related PUD demonstrated an increasing trend(P=0.04),and idiopathic PUD showed an increasing trend in the old-age group(P=0.01)during 10 *** with drug-related PUD had significantly more comorbidities and concomitant ulcerogenic *** idiopathic PUD group had a significantly higher number of patients with chronic liver *** With the aging population increase,the effects of concomitant ulcerogenic drugs and preventive strategies should be investigated in drug-induced *** studies are required to clarify the relationship between idiopathic PUD and chronic liver disease.

关键词： Peptic ulcer disease Drug Idiopathic Trend Characteristics

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TonEBP expression is essential in the IL-1β–induced migration and invasion of human A549 lung cancer cells

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Oncology Research 2024年第1期32卷 151-161页

作者： HEE JU SONG TAEHEE KIM HAN NA choi SOO jin KIM SANG DO LEE Department of Physiology School of MedicineChungnam National UniversityDaejeon35015Korea

Lung cancer has the highest mortality rate among all cancers,in part because it readily *** tumor microenvironment,comprising blood vessels,fibroblasts,immune cells,and macrophages[including tumor-associated macrophages(TAMs)],is closely related to cancer cell growth,migration,and *** secrete several cytokines,including interleukin(IL)-1β,which participate in cancer migration and invasion.p21-activated kinase 1(PAK1),an important signaling molecule,induces cell migration and invasion in several ***responsive enhancer-binding protein(TonEBP)is also known to participate in cancer cell growth,migration,and ***,the mechanisms by which it increases lung cancer migration remain ***,in this study,we aimed to elucidate the mechanisms by which IL-1βand TonEBP affect lung cancer cell migration and *** found that A549 cocultured-MΦ-secreted IL-1βinduced A549 cell migration and invasion via the PAK1 *** deficiency reduced A549 cell migration and invasion and increased responsiveness to IL-1β–induced migration and ***1 phosphorylation,which was promoted by IL-1β,was reduced when TonEBP was *** results suggest that TonEBP plays an important role in IL-1βinduction and invasiveness of A549 cells via the PAK1 *** findings could be valuable in identifying potential targets for lung cancer treatment.

关键词： Lung cancer TonEBP Tumor microenvironment Tumor-associated macrophage IL-1β

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